(CNN) -- Presumptive Democratic presidential nominee Sen. John Kerry holds wide leads over President Bush among black and Latino voters questioned, but Bush runs slightly stronger among minority voters than he did four years ago and has a double-digit lead among white voters, according to a new Gallup poll looking at racial contrasts in the presidential race.

The poll, released Tuesday, found that in a two-way race between Bush and Kerry, 53 percent of white registered voters supported Bush, while 41 percent supported Kerry.

Among black voters, Kerry led Bush 81 percent to 12 percent, and among Latinos, the Massachusetts senator led 57 percent to 38 percent.

Exit polls from the 2000 election showed that Bush received only 9 percent of the black vote, compared to 90 percent for Democrat Al Gore, and 35 percent of the Latino vote, compared to 62 percent for Gore.

So Kerry's lead over Bush among black voters in the new poll was about 12 points smaller than Gore's gap in 2000; among Latinos, it was 8 points smaller.

Four years ago, exit polls showed Bush carried 54 percent of the white vote, to just 42 percent for Gore -- a 12-point gap identical to what was found in the Gallup poll.

The poll also found that independent candidate Ralph Nader siphons more support from Kerry than Bush among minority voters in a three-way race.

Asked whether they would choose Democrats or Republicans to represent them in Congress this year, 48 percent of whites picked the GOP and 42 percent the Democrats.

But blacks went Democratic by a margin of 83 percent to 14 percent, and Hispanics leaned to the Democrats by a 60-35 percent margin.

The poll of 2,250 adults were conducted June 9-30. Among all registered voters, the margin of error for questions about the political races was plus or minus 5.5 percentage points; among minority voters, it was plus or minus 3.5 percentage points. The question on job approval had a margin of error of plus or minus 4.5 percentage points.